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E-M:/ Tuesday/Wednesday Smog Episode Coming

Enviro-Mich message from "Alex J. Sagady & Associates" <ajs@sagady.com>

Air Quality Evaluation Unit.....


An Ozone Action! Day Alert Has Been Declared for Tuesday, July 31...


An Ozone Action! Day Alert Has Been Declared for Tuesday, July 31...

                            OZONE ACTION! WEATHER SUMMARY

Monday, July 30, 2001

An Ozone Action! Day alert has been declared for Tuesday, July 31 for 
Southeast AND West Michigan!!!!

During Monday, a high pressure system will set up over the Ohio valley 
causing the Great Lakes region to experience light winds,
sunny skies, and temperatures approaching 90 degrees. With the light winds, 
we can expect some areas to experience rising ozone
concentrations as unmixed air begins to stagnate with accumulating urban 
air pollutants. As a result, we expect Monday's ozone
levels will creep into the moderate levels with possibly a few urban 
stations exceeding the 85 ppb threshold.

By Tuesday, high background concentrations left over from Monday's air 
stagnation will combine with urban air transport from
upwind cities as winds shift to the southwest. The combination of stagnated 
air with urban air transport spells air quality trouble
when you include the sunny skies, muggy conditions, and temperatures 
exceeding the 90 degree mark.

As a result, an Ozone Action! Day IS declared for both Southeast Michigan 
AND West Michigan for Tuesday, July 31. Individuals
susceptible to elevated ozone levels and/or high temperatures should make 
every effort to remain in an air conditioned

Conditions promise to be similar, if not worse, Wednesday. We will review 
the latest model runs Tuesday morning to get a better
feel for how Wednesday's weather will unfold and update this forecast. Long 
range forecasts are predicting the passage of a front
during Thursday which will provide relief for the end of the week.

Alex J. Sagady & Associates        Email:  ajs@sagady.com

Environmental Enforcement, Permits/Technical Review, Public Policy and
Communications on Air, Water and Waste Issues
and Community Environmental Protection

PO Box 39  East Lansing, MI  48826-0039
(517) 332-6971 (voice); (517) 332-8987 (fax)

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and Conservation Issues and Michigan-based Citizen Action.   Archives at

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